but as you say there are environment externallalities as economists like to call it. the ways in which the food companies push out the environmental costs of what it is that they produce. they push out the healthcare costs, when we buy a dollar burger built into that dollar is not the long term healthcare cost of eating foods that is high in salt and fat but these are the ways that corporations manage to avoid the full costs. >> gavin: you talked about $200 hamburger. has there been actual work through the economics of a hamburger? >> yes the 200-dollar burger is an idea that came from a bunch of researchers in india. if this burger comes from a cow that was grazed on land that once upon a time was rain forest we can factor in the loss ecoservice and that's just the footprint. that does not include the low wages that are paid in the food industry or fields where even today we have workers who are living in conditions of modern day slavery. they're growing the tomatoes that end up in our burgers. the $200 hamburger is just $200 because of the environmental costs. if we